Current Polar Vortex Map 2025

Current Polar Vortex Map 2025. As you can see, a la niña phase has a higher chance of producing a polar vortex collapse event. For the gefsv12 forecast issued on 18 december 2024, the winds at 60 degrees north (the mean location of the polar vortex) are forecast to remain stronger than normal for at.

Winters with at least one polar vortex disruption/sudden stratospheric warming (ssw) are marked with a black outline (and years with two have two circles). Firstly, the great lakes’ surface water temperatures are still near 40.